Reinforcing of RCS Control Ability by Utilizing Jet Interaction Force
JAXA Supercomputer System Annual Report April 2017-March 2018
Report Number: R17EA1403
Subject Category: Aeronautical Technology
- Responsible Representative: Shigeru Hamamoto, Aeronautical Technology Directorate, Aerodynamics Resuearch Unit
- Contact Information: Hajime Miki miki.hajime@jaxa.jp
- Members: Hajime Miki, Yoshiki Takama, Keisuke Fujii
Abstract
A capsule lacks its attitude control ability during a reentry flight. The purpose of this study is to utilize RCS interaction force for reinforcing the ability by changing the external shape locally.
Reference URL
N/A
Reasons for using JSS2
The use of JSS2 was nessesary for conducting CFD analysis to survey the validity of the capsule shape change in a short period before manifucturing a wind tunnel model.
Achievements of the Year
HRV capsule was changed its external shape near the RCS, and CFD analysises using FaSTAR code were performed on that capsule to examine variations of the interaction force. Figure 1 shows pressure distributions on its after-body, and it seems the RCS interaction causes mainly on the shape changed part. As shown in Fig. 2, the interaction force increased in a direction of reinforcing the RCS control ability. The design and manufacuture of wind tunnel model was carried out based on this CFD result.
Publications
■ Presentations
1)Miki, H., Fujii. K. “Prediction of Jet Interaction Heating on a Reentry Capsule”, SciTech2018, AIAA-2018-0382.
Usage of JSS2
Computational Information
- Process Parallelization Methods: MPI
- Thread Parallelization Methods: N/A
- Number of Processes: 128
- Elapsed Time per Case: 20.00 hours
Resources Used
Fraction of Usage in Total Resources*1(%): 0.05
Details
Please refer to System Configuration of JSS2 for the system configuration and major specifications of JSS2.
System Name | Amount of Core Time(core x hours) | Fraction of Usage*2(%) |
---|---|---|
SORA-MA | 417,613.89 | 0.06 |
SORA-PP | 139.20 | 0.00 |
SORA-LM | 0.00 | 0.00 |
SORA-TPP | 0.00 | 0.00 |
File System Name | Storage Assigned(GiB) | Fraction of Usage*2(%) |
---|---|---|
/home | 013.70 | 0.01 |
/data | 1,229.21 | 0.02 |
/ltmp | 2,669.27 | 0.20 |
Archiver Name | Storage Used(TiB) | Fraction of Usage*2(%) |
---|---|---|
J-SPACE | 0.00 | 0.00 |
*1: Fraction of Usage in Total Resources: Weighted average of three resource types (Computing, File System, and Archiver).
*2: Fraction of Usage:Percentage of usage relative to each resource used in one year.
JAXA Supercomputer System Annual Report April 2017-March 2018